Suppose scientists believe that they've discovered a new planet. which of the following must be true for the object they've found to qualify as a planet?

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?